UiElementTreeEditPartFactory.java

/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Eclipse Public License, Version 1.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.eclipse.org/org/documents/epl-v10.php
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.ide.eclipse.editors.layout.parts;

import com.android.ide.eclipse.editors.uimodel.UiDocumentNode;
import com.android.ide.eclipse.editors.uimodel.UiElementNode;

import org.eclipse.gef.EditPart;
import org.eclipse.gef.EditPartFactory;
import org.eclipse.gef.editparts.AbstractTreeEditPart;
import org.eclipse.ui.views.contentoutline.IContentOutlinePage;

/**
 * {@link EditPartFactory} to create {@link AbstractTreeEditPart} for {@link UiElementNode} objects.
 * These objects are used in the {@link IContentOutlinePage} linked to the layout editor. 
 */
public class UiElementTreeEditPartFactory implements EditPartFactory {

    public EditPart createEditPart(EditPart context, Object model) {
        if (model instanceof UiDocumentNode) {
            return new UiDocumentTreeEditPart((UiDocumentNode) model);
        } else if (model instanceof UiElementNode) {
            UiElementNode node = (UiElementNode) model;
            if (node.getDescriptor().hasChildren()) {
                return new UiLayoutTreeEditPart(node);
            } else {
                return new UiViewTreeEditPart(node);
            }
        }
        return null;
    }

}